Theres a summoning pool missing in the giant snow area, not far from the skull bird boss, next to the way down the north bastion with the electric commander. Sorry for my english im not sure of the english names.
im alt-tabing to this map and doing my playthrough region by region and trying to get everything, not rushing main bosses at all. i wonder if that's right way to approach this game, but honestly it;s so easy to miss out on stuff in this amazing game i dont wanna go blind in it
There's no "right way" to play this game. Do what feels enjoyable to you. I personally had to play the game with zero help or guidance to get all the info before release. I enjoyed it. Now I have the map that we made and I use it for my playthroughs to get my completionism under control and I enjoy that too. Just have fun!